Find An Expert

Find An Expert

City of Hope offers members of the media access to scientific and medical experts, innovative research and clinical trials, inspirational human stories and much more.


We can connect journalists with scientists and clinicians at the forefront of research, treatment and issues related to cancer, diabetes and other life-threatening diseases.

Car T Immunotherapy

George Semeniuk III, M.D.
George Semeniuk III, M.D.
Medical Oncologist and Hematologist
George Semeniuk, M.D., was drawn to cancer care while in medical school, after a young family member died of brain cancer. More than two decades into his career in oncology, he strives to help each patient achieve the best possible outcome with an individualized treatment plan based on the understanding that each patient, and each family, is unique. As a patient of Dr. Semeniuk, you can expect to be greeted with a caring and compassionate attitude. You will get his undivided attention during your appointment. He works directly with your other providers to coordinate a personalized treatment plan that coincides with your values and goals. His practice focuses on head and neck, lung and skin cancers, and he works in conjunction with researchers at City of Hope to pioneer clinical research that focuses on various anti-cancer drug therapies in various phases of development. Dr. Semeniuk is trained in integrative oncology and combines complementary therapies with mainstream oncology care to address patients' physical, psychological and spiritual needs. After earning his M.D. at St. George's University in New York, Dr. Semeniuk was an intern and resident in internal medicine at the University of California San Francisco where he served as chief resident, a fellow in oncology/hematology at University of Texas Southwestern Medical Center and a fellow in integrative medicine at the University of Arizona. Before City of Hope, he maintained a longstanding private practice and held positions at Hoag Memorial Hospital Presbyterian and Keck School of Medicine of USC. Away from the clinic, Dr. Semeniuk enjoys golf, tennis, hiking, cooking and having new adventures with his family.

Radiation Oncology

Doctor Terence Williams Headshot
Terence M. Williams, M.D., Ph.D.
Radiation Oncologist
Terence M. Williams, M.D., Ph.D., joins City of Hope as a professor and chair of the Department of Radiation Oncology. Dr. Williams specializes in treating patients with thoracic and gastrointestinal cancers, with an emphasis on nonsmall cell lung, pancreatic and hepatobiliary malignancies. Before joining City of Hope, he held several leadership roles at The James Cancer Hospital and Comprehensive Cancer Center at The Ohio State University. Dr. Williams received his M.D. and Ph.D. from Albert Einstein College of Medicine in New York and completed his residency in radiation oncology and internship in internal medicine at University of Michigan Medical Center. Before joining City of Hope, he held several leadership roles at The James Cancer Hospital and Comprehensive Cancer Center at The Ohio State University. He has a National Institutes of Health-funded research laboratory and has received numerous funding and awards from the National Cancer Institute, National Institutes of Health, American Society of Radiation Oncology, American Society of Clinical Oncology, American Cancer Society and the Radiologic Society of North America. He also serves as a permanent member of the National Institutes of Health Radiation Therapeutics and Biology study section, vice-chair of American Society for Radiation Oncology biology scientific programs, and serves on numerous committees for NRG Oncology and Alliance for Clinical Trials in Oncology. His research interests are in stereotactic body radiation therapy, experimental therapeutics, radiogenomics, DNA repair, radiobiology, nutrient scavenging and theranostics.